Meraux is a census-designated place (CDP) in St. Bernard Parish, Louisiana, United States.

In 2005, the town was devastated by storm surge and wind associated with Hurricane Katrina which destroyed the Mississippi River-Gulf Outlet Canal (MRGO) levee.

In 2000,[6] there were 10,192 people, 3,707 households, and 2,772 families residing in the CDP.

At the 2020 United States census, there were 6,804 people, 2,184 households, and 1,632 families residing in the CDP.

The racial makeup was 65.06% non-Hispanic white, 14.77% Black or African American, 0.59% Native American, 2.23% Asian, 4.53% mixed or other race, and 12.82% Hispanic or Latino of any race.